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[Bug c++/69564] [5/6/7 Regression] lto and/or C++ make scimark2 LU slower
- From: "amker at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 17 Feb 2017 16:16:10 +0000
- Subject: [Bug c++/69564] [5/6/7 Regression] lto and/or C++ make scimark2 LU slower
- Auto-submitted: auto-generated
- References: <bug-69564-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69564
--- Comment #35 from amker at gcc dot gnu.org ---
(In reply to Richard Biener from comment #34)
> But as A + 8 >= B || A >= B + 8 is the same as ABS (A - B) >= 8 we might do
> better re-writing the overlap test in terms of this (of course it all really
> depends on whether that and the offset stripping handles arrays crossing the
> "signed overlap" boundary in the address space correctly...)
I had a patch doing this, will revise and send for review. Thanks.